| /* ffmpeg/libavcodec/ppc/fdct_altivec.c, this file is part of the |
| * AltiVec optimized library for the FFMPEG Multimedia System |
| * Copyright (C) 2003 James Klicman <james@klicman.org> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| |
| #include "libavutil/common.h" |
| #include "libavcodec/dsputil.h" |
| #include "dsputil_ppc.h" |
| #include "gcc_fixes.h" |
| |
| |
| #define vs16(v) ((vector signed short)(v)) |
| #define vs32(v) ((vector signed int)(v)) |
| #define vu8(v) ((vector unsigned char)(v)) |
| #define vu16(v) ((vector unsigned short)(v)) |
| #define vu32(v) ((vector unsigned int)(v)) |
| |
| |
| #define C1 0.98078525066375732421875000 /* cos(1*PI/16) */ |
| #define C2 0.92387950420379638671875000 /* cos(2*PI/16) */ |
| #define C3 0.83146959543228149414062500 /* cos(3*PI/16) */ |
| #define C4 0.70710676908493041992187500 /* cos(4*PI/16) */ |
| #define C5 0.55557024478912353515625000 /* cos(5*PI/16) */ |
| #define C6 0.38268342614173889160156250 /* cos(6*PI/16) */ |
| #define C7 0.19509032368659973144531250 /* cos(7*PI/16) */ |
| #define SQRT_2 1.41421353816986083984375000 /* sqrt(2) */ |
| |
| |
| #define W0 -(2 * C2) |
| #define W1 (2 * C6) |
| #define W2 (SQRT_2 * C6) |
| #define W3 (SQRT_2 * C3) |
| #define W4 (SQRT_2 * (-C1 + C3 + C5 - C7)) |
| #define W5 (SQRT_2 * ( C1 + C3 - C5 + C7)) |
| #define W6 (SQRT_2 * ( C1 + C3 + C5 - C7)) |
| #define W7 (SQRT_2 * ( C1 + C3 - C5 - C7)) |
| #define W8 (SQRT_2 * ( C7 - C3)) |
| #define W9 (SQRT_2 * (-C1 - C3)) |
| #define WA (SQRT_2 * (-C3 - C5)) |
| #define WB (SQRT_2 * ( C5 - C3)) |
| |
| |
| static vector float fdctconsts[3] = { |
| { W0, W1, W2, W3 }, |
| { W4, W5, W6, W7 }, |
| { W8, W9, WA, WB } |
| }; |
| |
| #define LD_W0 vec_splat(cnsts0, 0) |
| #define LD_W1 vec_splat(cnsts0, 1) |
| #define LD_W2 vec_splat(cnsts0, 2) |
| #define LD_W3 vec_splat(cnsts0, 3) |
| #define LD_W4 vec_splat(cnsts1, 0) |
| #define LD_W5 vec_splat(cnsts1, 1) |
| #define LD_W6 vec_splat(cnsts1, 2) |
| #define LD_W7 vec_splat(cnsts1, 3) |
| #define LD_W8 vec_splat(cnsts2, 0) |
| #define LD_W9 vec_splat(cnsts2, 1) |
| #define LD_WA vec_splat(cnsts2, 2) |
| #define LD_WB vec_splat(cnsts2, 3) |
| |
| |
| #define FDCTROW(b0,b1,b2,b3,b4,b5,b6,b7) /* {{{ */ \ |
| x0 = vec_add(b0, b7); /* x0 = b0 + b7; */ \ |
| x7 = vec_sub(b0, b7); /* x7 = b0 - b7; */ \ |
| x1 = vec_add(b1, b6); /* x1 = b1 + b6; */ \ |
| x6 = vec_sub(b1, b6); /* x6 = b1 - b6; */ \ |
| x2 = vec_add(b2, b5); /* x2 = b2 + b5; */ \ |
| x5 = vec_sub(b2, b5); /* x5 = b2 - b5; */ \ |
| x3 = vec_add(b3, b4); /* x3 = b3 + b4; */ \ |
| x4 = vec_sub(b3, b4); /* x4 = b3 - b4; */ \ |
| \ |
| b7 = vec_add(x0, x3); /* b7 = x0 + x3; */ \ |
| b1 = vec_add(x1, x2); /* b1 = x1 + x2; */ \ |
| b0 = vec_add(b7, b1); /* b0 = b7 + b1; */ \ |
| b4 = vec_sub(b7, b1); /* b4 = b7 - b1; */ \ |
| \ |
| b2 = vec_sub(x0, x3); /* b2 = x0 - x3; */ \ |
| b6 = vec_sub(x1, x2); /* b6 = x1 - x2; */ \ |
| b5 = vec_add(b6, b2); /* b5 = b6 + b2; */ \ |
| cnst = LD_W2; \ |
| b5 = vec_madd(cnst, b5, mzero); /* b5 = b5 * W2; */ \ |
| cnst = LD_W1; \ |
| b2 = vec_madd(cnst, b2, b5); /* b2 = b5 + b2 * W1; */ \ |
| cnst = LD_W0; \ |
| b6 = vec_madd(cnst, b6, b5); /* b6 = b5 + b6 * W0; */ \ |
| \ |
| x0 = vec_add(x4, x7); /* x0 = x4 + x7; */ \ |
| x1 = vec_add(x5, x6); /* x1 = x5 + x6; */ \ |
| x2 = vec_add(x4, x6); /* x2 = x4 + x6; */ \ |
| x3 = vec_add(x5, x7); /* x3 = x5 + x7; */ \ |
| x8 = vec_add(x2, x3); /* x8 = x2 + x3; */ \ |
| cnst = LD_W3; \ |
| x8 = vec_madd(cnst, x8, mzero); /* x8 = x8 * W3; */ \ |
| \ |
| cnst = LD_W8; \ |
| x0 = vec_madd(cnst, x0, mzero); /* x0 *= W8; */ \ |
| cnst = LD_W9; \ |
| x1 = vec_madd(cnst, x1, mzero); /* x1 *= W9; */ \ |
| cnst = LD_WA; \ |
| x2 = vec_madd(cnst, x2, x8); /* x2 = x2 * WA + x8; */ \ |
| cnst = LD_WB; \ |
| x3 = vec_madd(cnst, x3, x8); /* x3 = x3 * WB + x8; */ \ |
| \ |
| cnst = LD_W4; \ |
| b7 = vec_madd(cnst, x4, x0); /* b7 = x4 * W4 + x0; */ \ |
| cnst = LD_W5; \ |
| b5 = vec_madd(cnst, x5, x1); /* b5 = x5 * W5 + x1; */ \ |
| cnst = LD_W6; \ |
| b3 = vec_madd(cnst, x6, x1); /* b3 = x6 * W6 + x1; */ \ |
| cnst = LD_W7; \ |
| b1 = vec_madd(cnst, x7, x0); /* b1 = x7 * W7 + x0; */ \ |
| \ |
| b7 = vec_add(b7, x2); /* b7 = b7 + x2; */ \ |
| b5 = vec_add(b5, x3); /* b5 = b5 + x3; */ \ |
| b3 = vec_add(b3, x2); /* b3 = b3 + x2; */ \ |
| b1 = vec_add(b1, x3); /* b1 = b1 + x3; */ \ |
| /* }}} */ |
| |
| #define FDCTCOL(b0,b1,b2,b3,b4,b5,b6,b7) /* {{{ */ \ |
| x0 = vec_add(b0, b7); /* x0 = b0 + b7; */ \ |
| x7 = vec_sub(b0, b7); /* x7 = b0 - b7; */ \ |
| x1 = vec_add(b1, b6); /* x1 = b1 + b6; */ \ |
| x6 = vec_sub(b1, b6); /* x6 = b1 - b6; */ \ |
| x2 = vec_add(b2, b5); /* x2 = b2 + b5; */ \ |
| x5 = vec_sub(b2, b5); /* x5 = b2 - b5; */ \ |
| x3 = vec_add(b3, b4); /* x3 = b3 + b4; */ \ |
| x4 = vec_sub(b3, b4); /* x4 = b3 - b4; */ \ |
| \ |
| b7 = vec_add(x0, x3); /* b7 = x0 + x3; */ \ |
| b1 = vec_add(x1, x2); /* b1 = x1 + x2; */ \ |
| b0 = vec_add(b7, b1); /* b0 = b7 + b1; */ \ |
| b4 = vec_sub(b7, b1); /* b4 = b7 - b1; */ \ |
| \ |
| b2 = vec_sub(x0, x3); /* b2 = x0 - x3; */ \ |
| b6 = vec_sub(x1, x2); /* b6 = x1 - x2; */ \ |
| b5 = vec_add(b6, b2); /* b5 = b6 + b2; */ \ |
| cnst = LD_W2; \ |
| b5 = vec_madd(cnst, b5, mzero); /* b5 = b5 * W2; */ \ |
| cnst = LD_W1; \ |
| b2 = vec_madd(cnst, b2, b5); /* b2 = b5 + b2 * W1; */ \ |
| cnst = LD_W0; \ |
| b6 = vec_madd(cnst, b6, b5); /* b6 = b5 + b6 * W0; */ \ |
| \ |
| x0 = vec_add(x4, x7); /* x0 = x4 + x7; */ \ |
| x1 = vec_add(x5, x6); /* x1 = x5 + x6; */ \ |
| x2 = vec_add(x4, x6); /* x2 = x4 + x6; */ \ |
| x3 = vec_add(x5, x7); /* x3 = x5 + x7; */ \ |
| x8 = vec_add(x2, x3); /* x8 = x2 + x3; */ \ |
| cnst = LD_W3; \ |
| x8 = vec_madd(cnst, x8, mzero); /* x8 = x8 * W3; */ \ |
| \ |
| cnst = LD_W8; \ |
| x0 = vec_madd(cnst, x0, mzero); /* x0 *= W8; */ \ |
| cnst = LD_W9; \ |
| x1 = vec_madd(cnst, x1, mzero); /* x1 *= W9; */ \ |
| cnst = LD_WA; \ |
| x2 = vec_madd(cnst, x2, x8); /* x2 = x2 * WA + x8; */ \ |
| cnst = LD_WB; \ |
| x3 = vec_madd(cnst, x3, x8); /* x3 = x3 * WB + x8; */ \ |
| \ |
| cnst = LD_W4; \ |
| b7 = vec_madd(cnst, x4, x0); /* b7 = x4 * W4 + x0; */ \ |
| cnst = LD_W5; \ |
| b5 = vec_madd(cnst, x5, x1); /* b5 = x5 * W5 + x1; */ \ |
| cnst = LD_W6; \ |
| b3 = vec_madd(cnst, x6, x1); /* b3 = x6 * W6 + x1; */ \ |
| cnst = LD_W7; \ |
| b1 = vec_madd(cnst, x7, x0); /* b1 = x7 * W7 + x0; */ \ |
| \ |
| b7 = vec_add(b7, x2); /* b7 += x2; */ \ |
| b5 = vec_add(b5, x3); /* b5 += x3; */ \ |
| b3 = vec_add(b3, x2); /* b3 += x2; */ \ |
| b1 = vec_add(b1, x3); /* b1 += x3; */ \ |
| /* }}} */ |
| |
| |
| |
| /* two dimensional discrete cosine transform */ |
| |
| void fdct_altivec(int16_t *block) |
| { |
| POWERPC_PERF_DECLARE(altivec_fdct, 1); |
| vector signed short *bp; |
| vector float *cp; |
| vector float b00, b10, b20, b30, b40, b50, b60, b70; |
| vector float b01, b11, b21, b31, b41, b51, b61, b71; |
| vector float mzero, cnst, cnsts0, cnsts1, cnsts2; |
| vector float x0, x1, x2, x3, x4, x5, x6, x7, x8; |
| |
| POWERPC_PERF_START_COUNT(altivec_fdct, 1); |
| |
| |
| /* setup constants {{{ */ |
| /* mzero = -0.0 */ |
| mzero = ((vector float)vec_splat_u32(-1)); |
| mzero = ((vector float)vec_sl(vu32(mzero), vu32(mzero))); |
| cp = fdctconsts; |
| cnsts0 = vec_ld(0, cp); cp++; |
| cnsts1 = vec_ld(0, cp); cp++; |
| cnsts2 = vec_ld(0, cp); |
| /* }}} */ |
| |
| |
| /* 8x8 matrix transpose (vector short[8]) {{{ */ |
| #define MERGE_S16(hl,a,b) vec_merge##hl(vs16(a), vs16(b)) |
| |
| bp = (vector signed short*)block; |
| b00 = ((vector float)vec_ld(0, bp)); |
| b40 = ((vector float)vec_ld(16*4, bp)); |
| b01 = ((vector float)MERGE_S16(h, b00, b40)); |
| b11 = ((vector float)MERGE_S16(l, b00, b40)); |
| bp++; |
| b10 = ((vector float)vec_ld(0, bp)); |
| b50 = ((vector float)vec_ld(16*4, bp)); |
| b21 = ((vector float)MERGE_S16(h, b10, b50)); |
| b31 = ((vector float)MERGE_S16(l, b10, b50)); |
| bp++; |
| b20 = ((vector float)vec_ld(0, bp)); |
| b60 = ((vector float)vec_ld(16*4, bp)); |
| b41 = ((vector float)MERGE_S16(h, b20, b60)); |
| b51 = ((vector float)MERGE_S16(l, b20, b60)); |
| bp++; |
| b30 = ((vector float)vec_ld(0, bp)); |
| b70 = ((vector float)vec_ld(16*4, bp)); |
| b61 = ((vector float)MERGE_S16(h, b30, b70)); |
| b71 = ((vector float)MERGE_S16(l, b30, b70)); |
| |
| x0 = ((vector float)MERGE_S16(h, b01, b41)); |
| x1 = ((vector float)MERGE_S16(l, b01, b41)); |
| x2 = ((vector float)MERGE_S16(h, b11, b51)); |
| x3 = ((vector float)MERGE_S16(l, b11, b51)); |
| x4 = ((vector float)MERGE_S16(h, b21, b61)); |
| x5 = ((vector float)MERGE_S16(l, b21, b61)); |
| x6 = ((vector float)MERGE_S16(h, b31, b71)); |
| x7 = ((vector float)MERGE_S16(l, b31, b71)); |
| |
| b00 = ((vector float)MERGE_S16(h, x0, x4)); |
| b10 = ((vector float)MERGE_S16(l, x0, x4)); |
| b20 = ((vector float)MERGE_S16(h, x1, x5)); |
| b30 = ((vector float)MERGE_S16(l, x1, x5)); |
| b40 = ((vector float)MERGE_S16(h, x2, x6)); |
| b50 = ((vector float)MERGE_S16(l, x2, x6)); |
| b60 = ((vector float)MERGE_S16(h, x3, x7)); |
| b70 = ((vector float)MERGE_S16(l, x3, x7)); |
| |
| #undef MERGE_S16 |
| /* }}} */ |
| |
| |
| /* Some of the initial calculations can be done as vector short before |
| * conversion to vector float. The following code section takes advantage |
| * of this. |
| */ |
| #if 1 |
| /* fdct rows {{{ */ |
| x0 = ((vector float)vec_add(vs16(b00), vs16(b70))); |
| x7 = ((vector float)vec_sub(vs16(b00), vs16(b70))); |
| x1 = ((vector float)vec_add(vs16(b10), vs16(b60))); |
| x6 = ((vector float)vec_sub(vs16(b10), vs16(b60))); |
| x2 = ((vector float)vec_add(vs16(b20), vs16(b50))); |
| x5 = ((vector float)vec_sub(vs16(b20), vs16(b50))); |
| x3 = ((vector float)vec_add(vs16(b30), vs16(b40))); |
| x4 = ((vector float)vec_sub(vs16(b30), vs16(b40))); |
| |
| b70 = ((vector float)vec_add(vs16(x0), vs16(x3))); |
| b10 = ((vector float)vec_add(vs16(x1), vs16(x2))); |
| |
| b00 = ((vector float)vec_add(vs16(b70), vs16(b10))); |
| b40 = ((vector float)vec_sub(vs16(b70), vs16(b10))); |
| |
| #define CTF0(n) \ |
| b##n##1 = ((vector float)vec_unpackl(vs16(b##n##0))); \ |
| b##n##0 = ((vector float)vec_unpackh(vs16(b##n##0))); \ |
| b##n##1 = vec_ctf(vs32(b##n##1), 0); \ |
| b##n##0 = vec_ctf(vs32(b##n##0), 0); |
| |
| CTF0(0); |
| CTF0(4); |
| |
| b20 = ((vector float)vec_sub(vs16(x0), vs16(x3))); |
| b60 = ((vector float)vec_sub(vs16(x1), vs16(x2))); |
| |
| CTF0(2); |
| CTF0(6); |
| |
| #undef CTF0 |
| |
| x0 = vec_add(b60, b20); |
| x1 = vec_add(b61, b21); |
| |
| cnst = LD_W2; |
| x0 = vec_madd(cnst, x0, mzero); |
| x1 = vec_madd(cnst, x1, mzero); |
| cnst = LD_W1; |
| b20 = vec_madd(cnst, b20, x0); |
| b21 = vec_madd(cnst, b21, x1); |
| cnst = LD_W0; |
| b60 = vec_madd(cnst, b60, x0); |
| b61 = vec_madd(cnst, b61, x1); |
| |
| #define CTFX(x,b) \ |
| b##0 = ((vector float)vec_unpackh(vs16(x))); \ |
| b##1 = ((vector float)vec_unpackl(vs16(x))); \ |
| b##0 = vec_ctf(vs32(b##0), 0); \ |
| b##1 = vec_ctf(vs32(b##1), 0); \ |
| |
| CTFX(x4, b7); |
| CTFX(x5, b5); |
| CTFX(x6, b3); |
| CTFX(x7, b1); |
| |
| #undef CTFX |
| |
| |
| x0 = vec_add(b70, b10); |
| x1 = vec_add(b50, b30); |
| x2 = vec_add(b70, b30); |
| x3 = vec_add(b50, b10); |
| x8 = vec_add(x2, x3); |
| cnst = LD_W3; |
| x8 = vec_madd(cnst, x8, mzero); |
| |
| cnst = LD_W8; |
| x0 = vec_madd(cnst, x0, mzero); |
| cnst = LD_W9; |
| x1 = vec_madd(cnst, x1, mzero); |
| cnst = LD_WA; |
| x2 = vec_madd(cnst, x2, x8); |
| cnst = LD_WB; |
| x3 = vec_madd(cnst, x3, x8); |
| |
| cnst = LD_W4; |
| b70 = vec_madd(cnst, b70, x0); |
| cnst = LD_W5; |
| b50 = vec_madd(cnst, b50, x1); |
| cnst = LD_W6; |
| b30 = vec_madd(cnst, b30, x1); |
| cnst = LD_W7; |
| b10 = vec_madd(cnst, b10, x0); |
| |
| b70 = vec_add(b70, x2); |
| b50 = vec_add(b50, x3); |
| b30 = vec_add(b30, x2); |
| b10 = vec_add(b10, x3); |
| |
| |
| x0 = vec_add(b71, b11); |
| x1 = vec_add(b51, b31); |
| x2 = vec_add(b71, b31); |
| x3 = vec_add(b51, b11); |
| x8 = vec_add(x2, x3); |
| cnst = LD_W3; |
| x8 = vec_madd(cnst, x8, mzero); |
| |
| cnst = LD_W8; |
| x0 = vec_madd(cnst, x0, mzero); |
| cnst = LD_W9; |
| x1 = vec_madd(cnst, x1, mzero); |
| cnst = LD_WA; |
| x2 = vec_madd(cnst, x2, x8); |
| cnst = LD_WB; |
| x3 = vec_madd(cnst, x3, x8); |
| |
| cnst = LD_W4; |
| b71 = vec_madd(cnst, b71, x0); |
| cnst = LD_W5; |
| b51 = vec_madd(cnst, b51, x1); |
| cnst = LD_W6; |
| b31 = vec_madd(cnst, b31, x1); |
| cnst = LD_W7; |
| b11 = vec_madd(cnst, b11, x0); |
| |
| b71 = vec_add(b71, x2); |
| b51 = vec_add(b51, x3); |
| b31 = vec_add(b31, x2); |
| b11 = vec_add(b11, x3); |
| /* }}} */ |
| #else |
| /* convert to float {{{ */ |
| #define CTF(n) \ |
| vs32(b##n##1) = vec_unpackl(vs16(b##n##0)); \ |
| vs32(b##n##0) = vec_unpackh(vs16(b##n##0)); \ |
| b##n##1 = vec_ctf(vs32(b##n##1), 0); \ |
| b##n##0 = vec_ctf(vs32(b##n##0), 0); \ |
| |
| CTF(0); |
| CTF(1); |
| CTF(2); |
| CTF(3); |
| CTF(4); |
| CTF(5); |
| CTF(6); |
| CTF(7); |
| |
| #undef CTF |
| /* }}} */ |
| |
| FDCTROW(b00, b10, b20, b30, b40, b50, b60, b70); |
| FDCTROW(b01, b11, b21, b31, b41, b51, b61, b71); |
| #endif |
| |
| |
| /* 8x8 matrix transpose (vector float[8][2]) {{{ */ |
| x0 = vec_mergel(b00, b20); |
| x1 = vec_mergeh(b00, b20); |
| x2 = vec_mergel(b10, b30); |
| x3 = vec_mergeh(b10, b30); |
| |
| b00 = vec_mergeh(x1, x3); |
| b10 = vec_mergel(x1, x3); |
| b20 = vec_mergeh(x0, x2); |
| b30 = vec_mergel(x0, x2); |
| |
| x4 = vec_mergel(b41, b61); |
| x5 = vec_mergeh(b41, b61); |
| x6 = vec_mergel(b51, b71); |
| x7 = vec_mergeh(b51, b71); |
| |
| b41 = vec_mergeh(x5, x7); |
| b51 = vec_mergel(x5, x7); |
| b61 = vec_mergeh(x4, x6); |
| b71 = vec_mergel(x4, x6); |
| |
| x0 = vec_mergel(b01, b21); |
| x1 = vec_mergeh(b01, b21); |
| x2 = vec_mergel(b11, b31); |
| x3 = vec_mergeh(b11, b31); |
| |
| x4 = vec_mergel(b40, b60); |
| x5 = vec_mergeh(b40, b60); |
| x6 = vec_mergel(b50, b70); |
| x7 = vec_mergeh(b50, b70); |
| |
| b40 = vec_mergeh(x1, x3); |
| b50 = vec_mergel(x1, x3); |
| b60 = vec_mergeh(x0, x2); |
| b70 = vec_mergel(x0, x2); |
| |
| b01 = vec_mergeh(x5, x7); |
| b11 = vec_mergel(x5, x7); |
| b21 = vec_mergeh(x4, x6); |
| b31 = vec_mergel(x4, x6); |
| /* }}} */ |
| |
| |
| FDCTCOL(b00, b10, b20, b30, b40, b50, b60, b70); |
| FDCTCOL(b01, b11, b21, b31, b41, b51, b61, b71); |
| |
| |
| /* round, convert back to short {{{ */ |
| #define CTS(n) \ |
| b##n##0 = vec_round(b##n##0); \ |
| b##n##1 = vec_round(b##n##1); \ |
| b##n##0 = ((vector float)vec_cts(b##n##0, 0)); \ |
| b##n##1 = ((vector float)vec_cts(b##n##1, 0)); \ |
| b##n##0 = ((vector float)vec_pack(vs32(b##n##0), vs32(b##n##1))); \ |
| vec_st(vs16(b##n##0), 0, bp); |
| |
| bp = (vector signed short*)block; |
| CTS(0); bp++; |
| CTS(1); bp++; |
| CTS(2); bp++; |
| CTS(3); bp++; |
| CTS(4); bp++; |
| CTS(5); bp++; |
| CTS(6); bp++; |
| CTS(7); |
| |
| #undef CTS |
| /* }}} */ |
| |
| POWERPC_PERF_STOP_COUNT(altivec_fdct, 1); |
| } |
| |
| /* vim:set foldmethod=marker foldlevel=0: */ |
